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EP3712715A1 - Watch case comprising a rotating bezel - Google Patents

Watch case comprising a rotating bezel Download PDF

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Publication number
EP3712715A1
EP3712715A1 EP19163518.4A EP19163518A EP3712715A1 EP 3712715 A1 EP3712715 A1 EP 3712715A1 EP 19163518 A EP19163518 A EP 19163518A EP 3712715 A1 EP3712715 A1 EP 3712715A1
Authority
EP
European Patent Office
Prior art keywords
bezel
braking element
box
compression member
annular chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19163518.4A
Other languages
German (de)
French (fr)
Inventor
Richard Della Santa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP19163518.4A priority Critical patent/EP3712715A1/en
Priority to JP2020040558A priority patent/JP7084440B2/en
Priority to CN202010182369.4A priority patent/CN111708267B/en
Priority to US16/819,423 priority patent/US11163265B2/en
Publication of EP3712715A1 publication Critical patent/EP3712715A1/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/04—Mounting the clockwork in the case; Shock absorbing mountings
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/0008—Cases for pocket watches and wrist watches

Definitions

  • the present invention relates to a watch case of a timepiece comprising a middle part and a bezel capable of rotating on the middle part, said case comprising a device for creating a friction torque interposed between the bezel and said middle part.
  • the invention also relates to a watch comprising such a case provided with this device.
  • external rotating bezels generally equip diver's watches, watches indicating universal time, and are used in numerous applications.
  • the rotating bezel is fluted at its periphery so as to be easily grasped.
  • it must be mounted on a middle part of a watch case so as to rotate regularly without offering too much resistance but without moving inadvertently.
  • the mounting of the rotating bezel must therefore be such as to ensure regular friction between the parts of the same series in order to allow rational manufacture not requiring alterations to each part.
  • the fixing device must be easy to put in place and present a sufficient guarantee against tearing off in the event of an accident or untimely friction, and on removal.
  • a rotating bezel is conventionally mounted on the middle part by means of a corrugated or flanged metal wire engaged simultaneously in the grooves of the bezel and of the part of the middle part which carries it.
  • the metal wire undergoes elastic deformations which modify its development in length.
  • the tear-off guarantee is not always satisfactory and, moreover, the correct positioning of these known devices is often difficult.
  • Rotating bezels are also known which are connected to a fixed part of the case by a flat elastic ring, split radially at a point on its periphery and whose outer edge as well as the inner edge are engaged in grooves that have the bezel. rotating and the part that carries it.
  • Such an assembly ensures the guiding of the rotating bezel with sufficient precision, but requires an additional device which blocks the two ends of the ring relative to one of the parts of the assembly.
  • the object of the present invention is to remedy the aforementioned problems as well as others by improving the known mounting operations of the rotating bezel on the middle part of the watch case so that they better meet the various requirements linked to the watch case. use of this scope.
  • the present invention relates to a watch case comprising a rotating bezel and a middle part, the bezel being rotatably mounted on the middle part, said bezel and said middle part defining between them an annular chamber in which a creation device is included.
  • a friction torque between the bezel and the middle part said device comprising a compression member and a braking element, the compression member exerting on the braking element a compressive force under the effect of which said braking element is pressed against the bezel.
  • the device for creating a friction torque between the bezel and the middle part thus participates in ensuring throughout the life of the watch a braking by friction / friction that is constant, regular and robust which allows the bezel to rotate regularly without offering too much resistance but without moving inadvertently.
  • the invention also relates to a watch comprising such a case.
  • a watch case 1 in particular a waterproof case.
  • a watch case 1 is preferably included in a wristwatch. It goes without saying that this example is given purely by way of illustration and that the present invention can be applied to any type of timepiece such as a pocket watch.
  • this watch 100 comprises a case 1 designated as a whole by the general reference numeral 1, comprising a bottom 2 and an assembly formed by a middle part 3 and a bezel 4 mounted to rotate on the middle part 3.
  • This middle part and this bezel can be by example made of steel, precious metal (gold, silver, platinum), alloy based on precious metals or ceramic, etc ...
  • Such a case 3 comprises an annular groove 16 defined on its outer wall and which is positioned in this case 1 facing an inner face of the back 2, said groove 16 comprising a seal 17.
  • the case 3 and this back 2 delimit a volume in which the various parts of the watch 100 are housed.
  • a glass / crystal 5 is attached to the middle part 4 with the interposition of a seal 18 between the glass 5 and said bezel 4.
  • the middle part 3 on which the bezel 4 is mounted mobile in rotation has two annular grooves 6 and 7 intended for mounting the bezel 4 and defined in the outer wall of this middle part 3.
  • the bezel 4 is mounted on the middle part 3 to l 'Using a spring 8, for example a multi-pan or polygonal wire spring engaging in the groove 6 of the middle part 3 as well as in a groove 9 of the bezel 4.
  • the grooves referenced 6 and 9 are arranged opposite one on the other and are provided respectively in the cylindrical outer wall of the middle part 3 and a cylindrical inner wall of the bezel 4.
  • this spring 8 the bezel 4 is pressed down against a shoulder 10 of the middle part 3.
  • the groove 7 of the middle part 3 comprises part of a device for creating a friction torque 11 participating in the mounting of the bezel 4 on this middle part 3. More precisely, this groove 7 is included in an annular chamber 12 of the watch box 1, which chamber 12, visible on the figure 2 , being defined between the bezel 4 and the middle part 3 in particular between the outer wall of the middle part 3 and the inner wall of the bezel 4.
  • This annular chamber 12 in which the device for creating a friction torque 11 is arranged is therefore formed by the groove 7 made in the outer wall of the middle part 3 and by a portion 13 of the inner wall of the bezel 4, this groove 7 and this portion 13 being arranged facing each other. It will be noted that this portion 13 comprises a contact zone 19 provided to cooperate with a friction face of a braking element 15 of the device 11.
  • the device for creating a friction torque 11 comprises is therefore formed by the groove 7 and an annular groove 20 both formed in the outer wall of the middle part 3, and by a portion 13 of the inner wall of the bezel 4.
  • the braking element 15 is arranged in the groove referenced 20 so that its friction face cooperates with the contact zone 19 of the device 11. It will be noted one such a configuration offers the advantage of allowing disassembly of the case 1, in particular disassembly of the bezel with the middle part, during which the braking element 15 and the compression member 14 are held in position in the middle part 3.
  • the device for creating a friction torque 11 between the bezel 4 and the middle part 3 comprises a compression member 14 and this braking element 15.
  • This compression member 14 is arranged in the groove 7 of the annular chamber 12 being both in contact with the bottom of the groove 7 or even the walls of the latter, and the braking element 15.
  • the braking element 15 it is defined to be in contact both with the contact zone 19 of the portion 13 of the annular chamber 12 and the compression member 14.
  • this compression member 14 is arranged in the annular chamber 12 so as to exert on the element braking 15 a compressive force under the effect of which said braking element 15 is pressed against the bezel 4.
  • a friction braking of the rotation of the bezel 4 is achieved by means of the 'compression member 14 disposed in the go rge 7 which makes a compression contact with the braking element 15 itself in frictional contact with the contact zone 19 of the portion 13 of the bezel 4.
  • Such a contact zone 19 of the portion 13 is defined to cooperate with the braking element 15 of the device 11.
  • the compression member 14 and the braking element 15 necessarily have at least one different characteristics relating for example to the material constituting them, their elasticity, their tensile strength, their resistance. compression failure, wear resistance, resistance to chemical agents, dimensional stability, creep resistance, coefficient of friction, abrasion resistance, etc. .
  • the compression member 14 is an O-ring such as an o-ring type seal of circular profile / section.
  • the o-ring seal is kept compressed in the groove 7 of the annular chamber 12, this groove 7 can then have a profile similar to that of this seal, for example a groove 7 of circular profile or more conventionally and as illustrated on the figures, in rectangular profile.
  • the material constituting this o-ring seal comprises, for example, rubber, silicone, nitrile or even any other elastomer of the brands Isoswiss TM and Isochron TM. It will be noted that the compression member has very good resistance to abrasion.
  • the braking element 15 is itself a ring.
  • This braking element 15 can be made of a polymer, in particular of polyoxymethylene, better known by the acronym “POM” or also under the name “Acetal”.
  • This braking element 15 is for example a single piece but it can also be formed of several pieces cooperating together.
  • This braking element 15 comprises the friction face provided to cooperate with the contact zone 19 of the portion 13 of the inner wall of the bezel 4, this face and this portion 13 both have complementary profiles. In other words, the contact zone 19 almost perfectly matches the shape of the friction face of the braking element 15.
  • This braking element 15 comprises a section of shape essentially similar to that of a quadrilateral.
  • the braking element has good resistance to fatigue, to chemical agents, to creep and to temperatures, in particular when it is made of POM.
  • the compression member 14 exerts a compressive force also called the compression ratio on the braking element 15.
  • This compression ratio of the compression member 14 can be freely adapted by adjusting the hardness. Shore or the section of this compression member 14.
  • This compression ratio of the compression member 14 also participates in determining the rotational torque of the bezel 4 or even the intensity of the friction torque between the bezel 4 and the caseband 3.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Braking Arrangements (AREA)

Abstract

Boîte de montre (1) comprenant une lunette tournante (4) et une carrure (3), la lunette (4) étant montée mobile en rotation sur la carrure (3), ladite lunette (4) et ladite carrure (3) définissant entre elles une chambre annulaire (12) dans laquelle est comprise un dispositif de création d'un couple de frottement (11) entre la lunette (4) et la carrure (3), ledit dispositif (11) comprenant un organe de compression (14) et un élément de freinage (15), l'organe de compression (14) exerçant sur l'élément de freinage (15) un effort compressif sous l'effet duquel ledit élément de freinage (15) est pressé contre la lunette (4).Watch case (1) comprising a rotating bezel (4) and a middle part (3), the bezel (4) being rotatably mounted on the middle part (3), said bezel (4) and said middle part (3) defining between they an annular chamber (12) in which is included a device for creating a friction torque (11) between the bezel (4) and the middle part (3), said device (11) comprising a compression member (14) and a braking element (15), the compression member (14) exerting on the braking element (15) a compressive force under the effect of which said braking element (15) is pressed against the bezel (4) .

Description

Domaine techniqueTechnical area

La présente invention concerne un boitier de montre d'une pièce d'horlogerie comportant une carrure et une lunette susceptible de tourner sur la carrure, ladite boîte comprenant un dispositif de création d'un couple de frottement intercalé entre la lunette et ladite carrure.The present invention relates to a watch case of a timepiece comprising a middle part and a bezel capable of rotating on the middle part, said case comprising a device for creating a friction torque interposed between the bezel and said middle part.

L'invention concerne aussi une montre comportant une telle boîte pourvue de ce dispositif.The invention also relates to a watch comprising such a case provided with this device.

Arrière-plan technologiqueTechnological background

Dans l'état de la technique, les lunettes tournantes extérieures équipent généralement les montres de plongeur, les montres indiquant l'heure universelle, et sont utilisées dans de nombreuses applications. En général, la lunette tournante est cannelée à sa périphérie de façon à être facilement saisissable. De plus, elle doit être montée sur une carrure d'une boîte de montre de façon à tourner régulièrement sans offrir une trop grande résistance mais sans non plus se déplacer intempestivement. Le montage de la lunette tournante doit donc être tel qu'il assure des frottements réguliers entre les pièces d'une même série afin de permettre une fabrication rationnelle ne nécessitant pas de retouches à chaque pièce. En outre, le dispositif de fixation doit être facile à mettre en place et présenter une garantie suffisante à l'arrachage lors d'un choc ou d'un frottement intempestif, et à l'enlèvement.In the state of the art, external rotating bezels generally equip diver's watches, watches indicating universal time, and are used in numerous applications. In general, the rotating bezel is fluted at its periphery so as to be easily grasped. In addition, it must be mounted on a middle part of a watch case so as to rotate regularly without offering too much resistance but without moving inadvertently. The mounting of the rotating bezel must therefore be such as to ensure regular friction between the parts of the same series in order to allow rational manufacture not requiring alterations to each part. In addition, the fixing device must be easy to put in place and present a sufficient guarantee against tearing off in the event of an accident or untimely friction, and on removal.

Il est connu qu'une lunette tournante est classiquement montée sur la carrure par l'intermédiaire d'un fil métallique ondulé ou à pans engagé simultanément dans des gorges de la lunette et de la partie de la carrure qui la porte. Lors de la mise en place de la lunette, le fil métallique subit des déformations élastiques qui modifient son développement en longueur. La garantie à l'arrachement n'est pas toujours satisfaisante et en outre, la mise en place correcte de ces dispositifs connus est souvent délicate.It is known that a rotating bezel is conventionally mounted on the middle part by means of a corrugated or flanged metal wire engaged simultaneously in the grooves of the bezel and of the part of the middle part which carries it. When fitting the bezel, the metal wire undergoes elastic deformations which modify its development in length. The tear-off guarantee is not always satisfactory and, moreover, the correct positioning of these known devices is often difficult.

On connaît également des lunettes tournantes qui sont reliées à une pièce fixe de la boîte par un anneau élastique plat, fendu radialement en un point de son pourtour et dont le bord extérieur de même que le bord intérieur sont engagés dans des gorges que présentent la lunette tournante et la pièce qui la porte. Un tel montage assure le guidage de la lunette tournante avec assez de précision, mais nécessite un dispositif supplémentaire qui bloque les deux extrémités de la bague par rapport à une des pièces de l'assemblage.Rotating bezels are also known which are connected to a fixed part of the case by a flat elastic ring, split radially at a point on its periphery and whose outer edge as well as the inner edge are engaged in grooves that have the bezel. rotating and the part that carries it. Such an assembly ensures the guiding of the rotating bezel with sufficient precision, but requires an additional device which blocks the two ends of the ring relative to one of the parts of the assembly.

Résumé de l'inventionSummary of the invention

La présente invention a pour objet de remédier aux problèmes susmentionnés ainsi qu'à d'autres en améliorant les opérations de montage connues de la lunette tournante sur la carrure de la boîte de montre de façon qu'elles répondent mieux aux diverses exigences liées à l'utilisation de cette lunette.The object of the present invention is to remedy the aforementioned problems as well as others by improving the known mounting operations of the rotating bezel on the middle part of the watch case so that they better meet the various requirements linked to the watch case. use of this scope.

A cet effet, la présente invention concerne une boîte de montre comprenant une lunette tournante et une carrure, la lunette étant montée mobile en rotation sur la carrure, ladite lunette et ladite carrure définissant entre elles une chambre annulaire dans laquelle est comprise un dispositif de création d'un couple de frottement entre la lunette et la carrure, ledit dispositif comprenant un organe de compression et un élément de freinage, l'organe de compression exerçant sur l'élément de freinage un effort compressif sous l'effet duquel ledit élément de freinage est pressé contre la lunette.To this end, the present invention relates to a watch case comprising a rotating bezel and a middle part, the bezel being rotatably mounted on the middle part, said bezel and said middle part defining between them an annular chamber in which a creation device is included. a friction torque between the bezel and the middle part, said device comprising a compression member and a braking element, the compression member exerting on the braking element a compressive force under the effect of which said braking element is pressed against the bezel.

Grâce à ces caractéristiques, le dispositif de création d'un couple de frottement entre la lunette et la carrure participe ainsi à assurer tout au long de la vie de la montre un freinage par frottement/friction constant, régulier et robuste qui permet ainsi à la lunette de tourner régulièrement sans offrir une trop grande résistance mais sans non plus se déplacer intempestivement.Thanks to these characteristics, the device for creating a friction torque between the bezel and the middle part thus participates in ensuring throughout the life of the watch a braking by friction / friction that is constant, regular and robust which allows the bezel to rotate regularly without offering too much resistance but without moving inadvertently.

Dans d'autres modes de réalisation :

  • - l'organe de compression est un joint de type o-ring ;
  • - l'élément de freinage est une bague en polyoxyméthylène ;
  • -.la dureté shore et/ou la section organe de compression contribue à définir l'effort compressif appliqué à l'élément de freinage ;
  • - la chambre annulaire est formée par une gorge ménagée dans une paroi extérieure de la carrure et par une portion d'une paroi intérieure de la lunette ;
  • - l'organe de compression est défini pour être en contact à la fois avec la gorge de la chambre annulaire et l'élément de freinage ;
  • - l'élément de freinage est défini pour être en contact à la fois avec la portion de la chambre annulaire et l'organe de compression ;
  • - l'élément de freinage comprend une face de friction prévue pour coopérer avec une zone de contact d'une portion de la chambre annulaire, et
  • - la boîte de montre comprend deux gorges définies respectivement dans la carrure et la lunette en étant agencées en regard l'une de l'autre et prévues pour comprendre un ressort participant au montage de la lunette sur la carrure.
In other embodiments:
  • - the compression member is an o-ring type seal;
  • - the braking element is a polyoxymethylene ring;
  • the shore hardness and / or the compression member section contributes to defining the compressive force applied to the braking element;
  • - The annular chamber is formed by a groove formed in an outer wall of the caseband and by a portion of an inner wall of the bezel;
  • - the compression member is defined to be in contact with both the groove of the annular chamber and the braking element;
  • - The braking element is defined to be in contact both with the portion of the annular chamber and the compression member;
  • - the braking element comprises a friction face designed to cooperate with a contact zone of a portion of the annular chamber, and
  • - The watch case comprises two grooves defined respectively in the middle part and the bezel by being arranged facing each other and provided to include a spring participating in the mounting of the bezel on the middle part.

L'invention concerne aussi une montre comprenant une telle boîte.The invention also relates to a watch comprising such a case.

Brève description des figuresBrief description of the figures

L'invention sera décrite ci-après de manière plus détaillée à l'aide des dessins annexés, donnés à titre d'exemples nullement limitatifs, dans lesquels :

  • la figure 1 est une vue partielle en coupe d'une boîte de montre conforme à la présente invention ;
  • la figure 2 est une vue à plus grande échelle d'une partie A de cette boîte illustrée sur la figure 1, selon la présente invention ;
  • la figure 3 est une vue partielle en coupe d'une variante de la boîte de montre conforme, et
    la figure 4 est une vue à plus grande échelle d'une partie B de cette variante de la boîte illustrée sur la figure 3, selon la présente invention.
The invention will be described below in more detail with the aid of the accompanying drawings, given by way of non-limiting examples, in which:
  • the figure 1 is a partial sectional view of a watch case according to the present invention;
  • the figure 2 is a view on a larger scale of part A of this box illustrated on figure 1 , according to the present invention;
  • the figure 3 is a partial sectional view of a variant of the compliant watch case, and
    the figure 4 is a view on a larger scale of part B of this variant of the box illustrated on figure 3 , according to the present invention.

Description détaillée de l'inventionDetailed description of the invention

La présente invention va être décrite en liaison avec une boîte de montre 1 notamment une boîte étanche. Une telle boîte de montre 1 est de préférence comprise dans une montre-bracelet. Il va de soi que cet exemple est donné seulement à titre purement illustratif et que la présente invention peut s'appliquer à tout type de pièce d'horlogerie comme une montre de poche.The present invention will be described in conjunction with a watch case 1, in particular a waterproof case. Such a watch case 1 is preferably included in a wristwatch. It goes without saying that this example is given purely by way of illustration and that the present invention can be applied to any type of timepiece such as a pocket watch.

Sur les figures 1, 2 et 3, cette montre 100 comprend une boîte 1 désignée dans son ensemble par la référence numérique générale 1, comportant un fond 2 et un ensemble formé par une carrure 3 et une lunette 4 montée tournante sur la carrure 3. Cette carrure et cette lunette peuvent être par exemple réalisées en acier, en métal précieux (or, argent, platine), en alliage à base de métaux précieux ou encore en céramique, etc...On the figures 1 , 2 and 3 , this watch 100 comprises a case 1 designated as a whole by the general reference numeral 1, comprising a bottom 2 and an assembly formed by a middle part 3 and a bezel 4 mounted to rotate on the middle part 3. This middle part and this bezel can be by example made of steel, precious metal (gold, silver, platinum), alloy based on precious metals or ceramic, etc ...

Une telle carrure 3 comporte une gorge annulaire 16 définie sur sa paroi extérieure et qui est positionnée dans cette boîte 1 en regard d'une face intérieure du fond 2, ladite gorge 16 comprenant un joint d'étanchéité 17. La carrure 3 et ce fond 2 délimitent un volume dans lequel sont logés les différents organes de la montre 100. Un verre/glace 5 est fixé sur la carrure 4 avec interposition d'un joint d'étanchéité 18 entre le verre 5 et ladite lunette 4.Such a case 3 comprises an annular groove 16 defined on its outer wall and which is positioned in this case 1 facing an inner face of the back 2, said groove 16 comprising a seal 17. The case 3 and this back 2 delimit a volume in which the various parts of the watch 100 are housed. A glass / crystal 5 is attached to the middle part 4 with the interposition of a seal 18 between the glass 5 and said bezel 4.

La carrure 3 sur laquelle la lunette 4 est montée mobile en rotation, présente deux gorges annulaires 6 et 7 destinées au montage de la lunette 4 et définies dans la paroi extérieure de cette carrure 3. La lunette 4 est montée sur la carrure 3 à l'aide d'un ressort 8 par exemple un ressort fil multipan ou polygonal s'engageant dans la gorge 6 de la carrure 3 ainsi que dans une gorge 9 de la lunette 4. Les gorges référencées 6 et 9 sont agencées en regard l'une de l'autre et sont ménagées respectivement dans la paroi extérieure cylindrique de la carrure 3 et une paroi intérieure cylindrique de la lunette 4. Ainsi par ce ressort 8, la lunette 4 est pressée vers le bas contre un épaulement 10 de la carrure 3.The middle part 3 on which the bezel 4 is mounted mobile in rotation, has two annular grooves 6 and 7 intended for mounting the bezel 4 and defined in the outer wall of this middle part 3. The bezel 4 is mounted on the middle part 3 to l 'Using a spring 8, for example a multi-pan or polygonal wire spring engaging in the groove 6 of the middle part 3 as well as in a groove 9 of the bezel 4. The grooves referenced 6 and 9 are arranged opposite one on the other and are provided respectively in the cylindrical outer wall of the middle part 3 and a cylindrical inner wall of the bezel 4. Thus by this spring 8, the bezel 4 is pressed down against a shoulder 10 of the middle part 3.

La gorge 7 de la carrure 3 comprend une partie d'un dispositif de création d'un couple de frottement 11 participant au montage de la lunette 4 sur cette carrure 3. Plus précisément, cette gorge 7 est comprise dans une chambre annulaire 12 de la boîte de montre 1, laquelle chambre 12, visible sur la figure 2, étant définie entre la lunette 4 et la carrure 3 en particulier entre la paroi extérieure de la carrure 3 et la paroi intérieure de la lunette 4.The groove 7 of the middle part 3 comprises part of a device for creating a friction torque 11 participating in the mounting of the bezel 4 on this middle part 3. More precisely, this groove 7 is included in an annular chamber 12 of the watch box 1, which chamber 12, visible on the figure 2 , being defined between the bezel 4 and the middle part 3 in particular between the outer wall of the middle part 3 and the inner wall of the bezel 4.

Cette chambre annulaire 12 dans laquelle est agencé le dispositif création d'un couple de frottement 11, est formée donc par la gorge 7 ménagée dans la paroi extérieure de la carrure 3 et par une portion 13 de la paroi intérieure de la lunette 4, cette gorge 7 et cette portion 13 étant agencées en regard l'une de l'autre. On notera que cette portion 13 comprend une zone de contact 19 prévue pour coopérer avec une face de friction de d'un élément de freinage 15 du dispositif 11.This annular chamber 12 in which the device for creating a friction torque 11 is arranged is therefore formed by the groove 7 made in the outer wall of the middle part 3 and by a portion 13 of the inner wall of the bezel 4, this groove 7 and this portion 13 being arranged facing each other. It will be noted that this portion 13 comprises a contact zone 19 provided to cooperate with a friction face of a braking element 15 of the device 11.

On notera en référence à la figure 3, que dans une variante de la boîte de montre 1, le dispositif création d'un couple de frottement 11 comprend est formée donc par la gorge 7 et une gorge annulaire 20 toutes deux ménagées dans la paroi extérieure de la carrure 3, et par une portion 13 de la paroi intérieure de la lunette 4. Dans cette configuration, l'élément de freinage 15 est agencé dans la gorge référencée 20 de manière à ce que sa face de friction coopère avec la zone de contact 19 du dispositif 11. On notera qu'une telle configuration offre l'avantage de permettre un démontage de la boîte 1, notamment un désassemblage de la lunette avec la carrure, lors duquel l'élément de freinage 15 et l'organe de compression 14 sont maintenus en position dans la carrure 3.It will be noted with reference to figure 3 , that in a variant of the watch case 1, the device for creating a friction torque 11 comprises is therefore formed by the groove 7 and an annular groove 20 both formed in the outer wall of the middle part 3, and by a portion 13 of the inner wall of the bezel 4. In this configuration, the braking element 15 is arranged in the groove referenced 20 so that its friction face cooperates with the contact zone 19 of the device 11. It will be noted one such a configuration offers the advantage of allowing disassembly of the case 1, in particular disassembly of the bezel with the middle part, during which the braking element 15 and the compression member 14 are held in position in the middle part 3.

Dans cette configuration, le dispositif de création d'un couple de frottement 11 entre la lunette 4 et la carrure 3, comprend un organe de compression 14 et cet élément de freinage 15. Cet organe de compression 14 est agencé dans la gorge 7 de la chambre annulaire 12 en étant à la fois en contact avec le fond de la gorge 7 voire les parois de cette dernière, et l'élément de freinage 15. S'agissant de l'élément de freinage 15, il est défini pour être en contact à la fois avec la zone de contact 19 de la portion 13 de la chambre annulaire 12 et l'organe de compression 14. Dans ce contexte, cet organe de compression 14 est agencé dans la chambre annulaire 12 de manière à exercer sur l'élément de freinage 15 un effort compressif sous l'effet duquel ledit élément de freinage 15 est pressé contre la lunette 4. Autrement dit, on comprend que dans cette configuration, un freinage par frottement de la rotation de la lunette 4 est réalisé au moyen de l'organe de compression 14 disposé dans la gorge 7 qui réalise un contact de compression avec l'élément de freinage 15 lui-même en contact de friction avec la zone de contact 19 de la portion 13 de la lunette 4. Une telle zone de contact 19 de la portion 13 est définie pour coopérer avec l'élément de freinage 15 du dispositif 11.In this configuration, the device for creating a friction torque 11 between the bezel 4 and the middle part 3, comprises a compression member 14 and this braking element 15. This compression member 14 is arranged in the groove 7 of the annular chamber 12 being both in contact with the bottom of the groove 7 or even the walls of the latter, and the braking element 15. As regards the braking element 15, it is defined to be in contact both with the contact zone 19 of the portion 13 of the annular chamber 12 and the compression member 14. In this context, this compression member 14 is arranged in the annular chamber 12 so as to exert on the element braking 15 a compressive force under the effect of which said braking element 15 is pressed against the bezel 4. In other words, it is understood that in this configuration, a friction braking of the rotation of the bezel 4 is achieved by means of the 'compression member 14 disposed in the go rge 7 which makes a compression contact with the braking element 15 itself in frictional contact with the contact zone 19 of the portion 13 of the bezel 4. Such a contact zone 19 of the portion 13 is defined to cooperate with the braking element 15 of the device 11.

On notera que dans ce dispositif 11, l'organe de compression 14 et l'élément de freinage 15 présentent nécessairement au moins une caractéristiques différentes relatives par exemple au matériau les constituant, à leur élasticité, à leur résistance à la traction, à leur résistance à la rupture par compression, à leur résistance à l'usure, à leur résistance à des agents chimiques, à leur stabilité dimensionnelle, à leur résistance au fluage, à leur coefficient de frottement, à leur résistance à l'abrasion, etc...It will be noted that in this device 11, the compression member 14 and the braking element 15 necessarily have at least one different characteristics relating for example to the material constituting them, their elasticity, their tensile strength, their resistance. compression failure, wear resistance, resistance to chemical agents, dimensional stability, creep resistance, coefficient of friction, abrasion resistance, etc. .

Dans ce contexte, l'organe de compression 14 est un joint torique tel qu'un joint de type o-ring de profil/section circulaire. Le joint o-ring est maintenu comprimé dans la gorge 7 de la chambre annulaire 12, cette gorge 7 peut être alors de profil voisin de celui de ce joint, par exemple une gorge 7 de profil circulaire ou plus classiquement et tel qu'illustré sur les figures, de profil rectangulaire. Dans une réalisation particulière, le matériau constituant ce joint o-ring comprend par exemple du caoutchouc, du Silicone, de la nitrile ou encore tout autre élastomère des marques Isoswiss™ et Isochron™. On notera que l'organe de compression présente une très bonne résistance à l'abrasion.In this context, the compression member 14 is an O-ring such as an o-ring type seal of circular profile / section. The o-ring seal is kept compressed in the groove 7 of the annular chamber 12, this groove 7 can then have a profile similar to that of this seal, for example a groove 7 of circular profile or more conventionally and as illustrated on the figures, in rectangular profile. In a particular embodiment, the material constituting this o-ring seal comprises, for example, rubber, silicone, nitrile or even any other elastomer of the brands Isoswiss ™ and Isochron ™. It will be noted that the compression member has very good resistance to abrasion.

Dans ce dispositif 11, l'élément de freinage 15 est quant à lui une bague. Cet élément de freinage 15 peut être réalisé en polymère en particulier en polyoxyméthylène plus connu sous l'acronyme « POM » ou encore sous la dénomination « Acétal ». Cet élément de freinage 15 est par exemple une pièce monobloc mais il peut également être formé de plusieurs pièces coopérant ensemble. Cet élément de freinage 15 comprend la face de friction prévue pour coopérer avec la zone de contact 19 de la portion 13 de la paroi intérieure de la lunette 4, cette face et cette portion 13 présentent toutes deux des profils complémentaires. Autrement dit, la zone de contact 19 épouse quasi-parfaitement la forme de la face de friction de l'élément de freinage 15. Cet élément de freinage 15 comprend une section de forme essentiellement similaire à celle d'un quadrilatère.In this device 11, the braking element 15 is itself a ring. This braking element 15 can be made of a polymer, in particular of polyoxymethylene, better known by the acronym “POM” or also under the name “Acetal”. This braking element 15 is for example a single piece but it can also be formed of several pieces cooperating together. This braking element 15 comprises the friction face provided to cooperate with the contact zone 19 of the portion 13 of the inner wall of the bezel 4, this face and this portion 13 both have complementary profiles. In other words, the contact zone 19 almost perfectly matches the shape of the friction face of the braking element 15. This braking element 15 comprises a section of shape essentially similar to that of a quadrilateral.

Un tel élément de freinage a de préférence :

  • un coefficient d'élasticité de 2,500 à 3,500 GPa, supérieur à celui de l'organe de compression 14 qui est compris entre 0.001 et 0.1 GPa, et qui correspond de préférence à une dureté de 60 à 80 shore et une compression maximum de 20%;
  • un faible coefficient de frottement de 0.25 à 0.60 (notamment sur l'acier), invariable avec les conditions : sec, mouillé, graissé;
  • une bonne résistance à l'usure de 0.75u/km et définie par l'application pratique qui a montré de bons résultats notamment lorsque l'élément de freinage est en POM et la lunette en acier ;
Such a braking element preferably has:
  • a coefficient of elasticity of 2,500 to 3,500 GPa, greater than that of the compression member 14 which is between 0.001 and 0.1 GPa, and which preferably corresponds to a hardness of 60 to 80 shore and a maximum compression of 20% ;
  • a low coefficient of friction of 0.25 to 0.60 (especially on steel), invariable with the conditions: dry, wet, greased;
  • good wear resistance of 0.75u / km and defined by the practical application which has shown good results in particular when the braking element is in POM and the bezel is in steel;

On notera de manière générale que l'élément de freinage présente une bonne résistance à la fatigue, aux agents chimiques, au fluage et aux températures notamment lorsqu'il est en POM.It will generally be noted that the braking element has good resistance to fatigue, to chemical agents, to creep and to temperatures, in particular when it is made of POM.

Ainsi que nous l'avons vu, l'organe de compression 14 exerce un effort compressif encore appelé taux de compression sur l'élément de freinage 15. Ce taux de compression de l'organe de compression 14 peut être adapté librement en ajustant la dureté Shore ou la section de cet organe de compression 14. Ce taux de compression de l'organe de compression 14 participe également à la détermination du couple de rotation de la lunette 4 ou encore de l'intensité du couple de frottement entre la lunette 4 et la carrure 3.As we have seen, the compression member 14 exerts a compressive force also called the compression ratio on the braking element 15. This compression ratio of the compression member 14 can be freely adapted by adjusting the hardness. Shore or the section of this compression member 14. This compression ratio of the compression member 14 also participates in determining the rotational torque of the bezel 4 or even the intensity of the friction torque between the bezel 4 and the caseband 3.

Bien entendu, la présente invention ne se limite pas à l'exemple illustré mais est susceptible de diverses variantes et modifications qui apparaîtront à l'homme de l'art.Of course, the present invention is not limited to the example illustrated but is susceptible of various variants and modifications which will appear to those skilled in the art.

Claims (10)

1. Boîte de montre (1) comprenant une lunette tournante (4) et une carrure (3), la lunette (4) étant montée mobile en rotation sur la carrure (3), ladite lunette (4) et ladite carrure (3) définissant entre elles une chambre annulaire (12) dans laquelle est comprise un dispositif de création d'un couple de frottement (11) entre la lunette (4) et la carrure (3), ledit dispositif (11) comprenant un organe de compression (14) et un élément de freinage (15), l'organe de compression (14) exerçant sur l'élément de freinage (15) un effort compressif sous l'effet duquel ledit élément de freinage (15) est pressé contre la lunette (4). 1. Watch case (1) comprising a rotating bezel (4) and a middle part (3), the bezel (4) being rotatably mounted on the middle part (3), said bezel (4) and said middle part (3) defining between them an annular chamber (12) in which is included a device for creating a friction torque (11) between the bezel (4) and the middle part (3), said device (11) comprising a compression member ( 14) and a braking element (15), the compression member (14) exerting on the braking element (15) a compressive force under the effect of which said braking element (15) is pressed against the bezel ( 4). 2. Boîte (1) selon la revendication précédente, caractérisée en ce que l'organe de compression (14) est un joint de type o-ring. 2. Box (1) according to the preceding claim, characterized in that the compression member (14) is an o-ring type seal. 3. Boîte (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de freinage (15) est une bague en polyoxyméthylène. 3. Box (1) according to any one of the preceding claims, characterized in that the braking element (15) is a polyoxymethylene ring. 4. Boîte (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la dureté shore et/ou la section organe de compression (14) contribue à définir l'effort compressif appliqué à l'élément de freinage (15). 4. Box (1) according to any one of the preceding claims, characterized in that the shore hardness and / or the compression member section (14) helps to define the compressive force applied to the braking element (15). . 5. Boîte (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la chambre annulaire (12) est formée par une gorge (7) ménagée dans une paroi extérieure de la carrure (3) et par une portion (13) d'une paroi intérieure de la lunette (4). 5. Box (1) according to any one of the preceding claims, characterized in that the annular chamber (12) is formed by a groove (7) formed in an outer wall of the middle part (3) and by a portion (13) ) an inner wall of the bezel (4). 6. Boîte (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'organe de compression (14) est défini pour être en contact à la fois avec la gorge (7) de la chambre annulaire (12) et l'élément de freinage (15). 6. Box (1) according to any one of the preceding claims, characterized in that the compression member (14) is defined to be in contact both with the groove (7) of the annular chamber (12) and the braking element (15). 8. Boîte (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de freinage (15) est défini pour être en contact à la fois avec la portion de la chambre annulaire (12) et l'organe de compression (14). 8. Box (1) according to any one of the preceding claims, characterized in that the braking element (15) is defined to be in contact with both the portion of the annular chamber (12) and the member. compression (14). 9. Boîte (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de freinage (15) comprend une face de friction prévue pour coopérer avec une zone de contact (19) d'une portion (13) de la chambre annulaire (12). 9. Box (1) according to any one of the preceding claims, characterized in that the braking element (15) comprises a friction face provided to cooperate with a contact zone (19) of a portion (13) of the annular chamber (12). 10. Boîte (1) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend deux gorges (6, 9) définies respectivement dans la carrure (3) et la lunette (4) en étant agencées en regard l'une de l'autre et prévues pour comprendre un ressort (8) participant au montage de la lunette (4) sur la carrure (3). 10. Box (1) according to any one of the preceding claims, characterized in that it comprises two grooves (6, 9) defined respectively in the middle part (3) and the bezel (4) being arranged opposite the one from the other and designed to include a spring (8) participating in the mounting of the bezel (4) on the middle part (3). 11. Montre comprenant une boîte (1) selon l'une quelconque des revendications précédentes. 11. Watch comprising a box (1) according to any one of the preceding claims.
EP19163518.4A 2019-03-18 2019-03-18 Watch case comprising a rotating bezel Pending EP3712715A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19163518.4A EP3712715A1 (en) 2019-03-18 2019-03-18 Watch case comprising a rotating bezel
JP2020040558A JP7084440B2 (en) 2019-03-18 2020-03-10 Watch case with rotating bezel
CN202010182369.4A CN111708267B (en) 2019-03-18 2020-03-16 Watch case comprising a rotary bezel
US16/819,423 US11163265B2 (en) 2019-03-18 2020-03-16 Watch case comprising a rotating bezel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19163518.4A EP3712715A1 (en) 2019-03-18 2019-03-18 Watch case comprising a rotating bezel

Publications (1)

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EP3712715A1 true EP3712715A1 (en) 2020-09-23

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EP19163518.4A Pending EP3712715A1 (en) 2019-03-18 2019-03-18 Watch case comprising a rotating bezel

Country Status (4)

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US (1) US11163265B2 (en)
EP (1) EP3712715A1 (en)
JP (1) JP7084440B2 (en)
CN (1) CN111708267B (en)

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US20200301365A1 (en) 2020-09-24
JP7084440B2 (en) 2022-06-14
CN111708267A (en) 2020-09-25
JP2020153978A (en) 2020-09-24
US11163265B2 (en) 2021-11-02
CN111708267B (en) 2022-04-05

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